Consider using k2pdfopt or some such tool. Also, this paper is from ICFP 2002 whose proceedings were published in print form. Several libraries hold it: https:

Consider using k2pdfopt or some such tool. Also, this paper is from ICFP 2002 whose proceedings were published in print form. Several libraries hold it: https://www.worldcat.org/title/proceedings-of-the-seventh-acm-sigplan-international-conference-on-functional-programming-icfp-02-pittsburgh-pennsylvania-usa-october-4-6-2002/oclc/51007669?referer=br&ht=edition https://www.worldcat.org/title/proceedings-of-the-seventh-ac... Anyway it appears that from 2017 onwards the ICFP proceedings are no longer published in print (they're published as part of PACMPL, an electronic journal), and indeed the ICFP 2020 papers for example (https://dl.acm.org/toc/pacmpl/2020/4/ICFP https://dl.acm.org/toc/pacmpl/2020/4/ICFP) are not in two columns anymore. So everything seems reasonable IMO.